No they do not. Only mammals and birds hibernate by changing their body temperature, breathing, heart and metabolic rate. Sea horses are unable to do so and hence, do not hibernate.
No, they are not. Bottom feeders are animals that feed near the bottom of water. Fish that are bottom feeders include groundfish, halibut, cod, bass, grouper, carps and bream.
Salmon, on the other hand do not feed near the bottom of the ocean or lake and so are not classified as bottom feeders.
The mouth of a basking shark is almost certainly its most recogizable feature. In fact, when they have their mouths closed, basking sharks are often mistake for great whites due to similarities in their body size and structure.
Just take a look at that mouth!
But just how big is the mouth of a basking shark, and why?
Before we get to the size of the mouth, we should talk about the overall size of the basking shark. This will give you some idea of not only the sheer size of the mouth, but also how big it is compared to the body of the shark.
Often reaching sizes of 20-26 feet in length and weighing over 5 tons, basking sharks are actually the second largest fish in the world, closely behind the whale shark.
With all that being said, let’s get to the mouth!
The mouth of an adult basking shark can get to approximately 1 meter (3.3 feet) wide.
That’s big enough to swallow most people whole! Fortunately, that will never be a concern because basking sharks are filter feeders which feed exclusively on small things floating in the water such as plankton, very small fish, and even fish eggs.
In fact, this is precisely the reason that the basking shark’s mouth is so large. It needs as much water as possible to be flowing through the gill rakers in its mouth, to collect enough food for the shark to survive. An adult basking shark can process over 1500 gallons on water per hour.
Swordfish, famously known for their long, spear-like bill which resembles a sword, are relatively large, as far as fish go. Adult swordfish commonly reach lengths of 3 meters (9.8 feet) or more, with rare cases of 4.55 meter (14.9 feet) swordfish being reported. With this massive size, it’s no surprise that their weight can be equally impressive.
But just how impressive? How much do swordfish weigh?
Well, an average sized swordfish will probably weigh between 150 and 250 pounds. That’s pretty big for a fish! It becomes much more impressive when you start looking at the larger swordfish, which can reach weights of more than 1000 pounds, with the largest approaching 1400 pounds. To put that in perspective, it’s about half the weight of a typical American car!
After years of debate, scientists have now finally confirmed that seahorses are indeed fish. In fact, the title of seahorse is given to over 54 different species of marine fish in the genus Hippocampus. The word “Hippocampus” comes from the Ancient Greek hippos meaning “horse” and kampos meaning “sea monster”.
Seahorses breathe using gills, have a swim bladder to control their buoyancy, and are classified in the class Actinopterygii, the bony fish that also includes larger fish like cod and tuna. Seahorses also have interlocking plates on the outside of their body which covers their spine made of bone. Although they do not have tail fins, they are equipped with 4 other fins, one that is located at the base of the tail, one under the belly, and one behind each cheek.
There are approximately 400 different species of sharks, of these 400 species about 40% of them lay eggs. All sharks mate through internal fertilization, during which the male shark inserts one or both of his claspers into the female’s reproductive tract and deposits his sperm. The mother may then either lay the fertilized eggs, or they might develop partially or fully inside of her. The young sharks get their nourishment from a yolk sac or through other methods.
Egg Laying Sharks
When a shark’s eggs are laid, they are in a protective egg case. These egg cases have tendrils, which allow them to attach to substrate such as corals, seaweed, etc. Sometimes these cases will wash ashore on the beach. In some species of sharks the egg cases are pushed to the bottom of the ocean or into crevices between and/or underneath rocks.
In oviparous shark species (egg laying), the young sharks get their nourishment from a yolk sac. These young sharks may take several months to hatch. In certain species of sharks, the eggs stay inside the female shark for a period of time before they are laid, this allows the sharks to develop fully and spend less time in the immobile egg cases before they hatch.
Types Of Sharks That Lay Eggs
Just a few species of sharks that lay eggs include:
- Bamboo sharks or carpet sharks
- Swell sharks
- Cat sharks
- Horn (bullhead) sharks
Live Bearing Sharks
The other 60% of shark species give birth to live young, rather than lay eggs. This is known as viviparity. In these species of sharks, the young remain in the mother’s uterus until they are born.
Bass can be considered to be “bottom feeders”. However they are also named “opportunistic eaters” as well since they are not very picky in what they consume. The word bottom feeder is often used to describe aquatic creatures that feed on or near the bottom of a body of water. This source of water can be anything from the ocean, to a river, lake, stream or aquarium. However unlike most bottom feeders, bass do not necessarily always get their food from the bottom of the water source in which they reside. They are predators that tend to feast upon food wherever they are able to locate it. Sometimes they can be found at the surface of shallow water where minnows are. Other times they may lurk at the bottom of the surface to prey upon crayfish. They tend to ambush their prey from behind objects such as logs, rocks and plants.
Bass are more likely to bite in the rain if it is a light rain. This is because light rain tends to make fish very active. In the early seasons rain can cause warming in the water which tends to make fish more active during this time. During the hot days of summer, rain can also be used to help cool the water down which often invokes species such as the largemouth bass to become more active.
When it rains it causes insects to inhabit areas around the water, as a result of this smaller fish that eat insects may thrive to these areas, thus drawing bass to the surface of the water as well, creating a feeding frenzy for all.
Another reason bass may be more attracted to thrive upon rainy days is because they are sensitive to light. Usually when it rains the sky darkens up a bit. Bass enjoy this and are also able to sense the change in wind and sky conditions causing them to feed more during this time. For this reason it has been said that some of the best fishing can be done when a cold front is approaching. The bass love to fill up on smaller fish, insects, etc. that come alive during a light rain.
When it begins to storm however, it usually will scare fish off and it is extremely hard during this time to try and entice a bass to bite an artificial lure. After this, the fish may be unwilling to eat for the next few days.
Still, some fishermen insist on continuing to try their luck at fishing during a storm. If you are still determined to do so, it is important to use the lightest line possible as well as the smallest lure possible. This should be practiced in order to not scare away the bass even more. Fishing can often prove to be difficult in muddy conditions as well as severe thunderstorms. It can also obviously bring more potential dangers.
It is actually a myth that bass are colorblind. Fish, including the bass see through their eyes and are also able to detect color. The eyes of fish are also usually rounder than most mammals due to the refractive index of the water; focus is achieved by moving the lens in and out so as not to distort things. The bass fish’s eyesight is one of its most important senses as it helps them locate food. They are considered “sight feeders” and use their other senses as well as support for their sense of sight.
Fish eyes are designed with a cornea, an iris, pupil, lens and a retina. The process of actually turning light into images all begins at the retina. This parabolic shaped surface located at the back of the eye is where photons of light are received and then transformed into electrical impulses for interpretation by the brain. The retina contains rods and cones (the photosensitive receptors that accomplish the task of receiving light and transforming it into impulses to direct it through nerve fibers leading to the brain).
One prominent characteristic of the fish eye from the outside is its bulbous nature. The outer layer of the eye known as the cornea is a dome shaped transparent layer that is the first to receive light. With the terrestrial vertebrate eye, light travels through the air and hits the cornea. Because the air and cornea differ in density however, the light is then refracted meaning it is bent and directed into the opening known as the pupil. Water and cornea are of about equal densities, so there is often little refraction with the cornea of a fish eye.
Because these creatures inhabit the water, that absorbs, scatters and bends light to a degree that makes seeing under water difficult and also different than seeing in air, fish have evolved out of necessity and are designed with specific anatomical characteristics in the eye that help them see underwater. In water colors behave differently and are not easily differentiated as they are when seen in the air. Therefore, fish eyes to varying degrees are equipped with retinal cones that can detect different ranges of color.
It should be noted that there are two types of photo receptors on the retina of the eye. The first are rods which are sensitive to light in general, and the second are cones which are sensitive to colored light. The ratio of rods and cones varies according to a fish’s habitat. There are also different types of cones located within a fish retina and each is sensitive to a different range of color. Most fish, similar to humans have red, green and blue sensing cones however the range of each color sensed can vary. Additionally some species of fish have been found to perceive ultraviolet light and also have patterns on their bodies that can only be seen under UV light. It is presumed that this is for attracting the attention of conspecifics.
Bass are definitely said to be most active at nighttime. In the months of July and August they will often seek deep water in order to find relief from the intense heat from the sun, skiers, boaters, and swimmers. A bass; eyes take much longer to adjust to the change of lighting and it is for this reason that fishing for bass can usually be quite slow for the first few hours of darkness. However, as night falls the bass will hug the bottom of the water to better silhouette prey against the night sky. Contrast is the key in lure selection here which could explain why black lures often seem to work best at night. For bass, nighttime is when they are extremely active in feeding.
To fish for bass at night requires a heavier tackle but limits the choices of lures. Using a longer rod with a heavier frame is better as it will allow for longer casts and provide more leverage for a strong hook set on big largemouth bass. When fishing for bass at night it is also important not to use a stop and go method. This is because bass have difficulty locating the source unless they happen to be located directly underneath the lure. They also will not usually follow a sound that they are unable to locate. So this is definitely something to keep in mind when trying your chances to fish at night.
Bright lights often attract bass when it is dark outside. These types of light sources are common around boat docks and swimming areas and can often be found swimming full of bass. When fishing for bass at night it is crucial to keep track of where your rod, etc. are. Tripping over items is easier since it is harder to see. This makes fishing at night a bit more dangerous. Keeping a small flashlight on hand can help when needing to locate something or tie a lure. Becoming familiar with the area you are fishing in is also key to safety and efficiency. In the light of day it is easy to cast cover and know where it is, however at night this becomes more difficult. Familiarize yourself with the water during the day and learn where obtrusions such as rocks, etc. may be. A life jacket should always be worn at night incase you fall overboard. Its harder to swim ashore when you have no idea where that shore is located in the dark. A compass can also come in handy.